As someone who has (and is currently unfortunately) writing enterprise web applications for IE users (government ) I just wish Microsoft would figure out if they are supporting standards or creating them. Even if you're 100% positive that the rest of the world is wrong... sometimes it's just better to go along with them rather than constantly trying to 'forge a new path'.

That being said I can't really comment on IE10 - didn't care for it in Windows 8 but in all honesty that's more because I hated Windows 8... the small time I spent with IE10 seemed promising in that it was very snappy and didn't have any obvious issues with any of the pages I tried. I would have to spend much longer with it and seeing how it deals with Adobe plugins (Acrobat,Flash/SW) as well as ActiveX controls & security. The track record is pretty dismal so I don't have too much faith - but I won't have to worry seeing as how most of my end users are still stuck on XP (I did say government didn't I?).